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#include "archive.hh"
#include "fs-accessor.hh"
#include "store-api.hh"
#include "globals.hh"
namespace nix {
LocalFSStore::LocalFSStore(const Params & params)
: Store(params)
, rootDir(get(params, "root"))
, stateDir(canonPath(get(params, "state", rootDir != "" ? rootDir + "/nix/var/nix" : settings.nixStateDir)))
, logDir(canonPath(get(params, "log", rootDir != "" ? rootDir + "/nix/var/log/nix" : settings.nixLogDir)))
{
}
struct LocalStoreAccessor : public FSAccessor
{
ref<LocalFSStore> store;
LocalStoreAccessor(ref<LocalFSStore> store) : store(store) { }
Path toRealPath(const Path & path)
{
Path storePath = store->toStorePath(path);
if (!store->isValidPath(storePath))
throw Error(format("path ‘%1%’ is not a valid store path") % storePath);
return store->getRealStoreDir() + std::string(path, store->storeDir.size());
}
FSAccessor::Stat stat(const Path & path) override
{
auto realPath = toRealPath(path);
struct stat st;
if (lstat(path.c_str(), &st)) {
if (errno == ENOENT || errno == ENOTDIR) return {Type::tMissing, 0, false};
throw SysError(format("getting status of ‘%1%’") % path);
}
if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode))
throw Error(format("file ‘%1%’ has unsupported type") % path);
return {
S_ISREG(st.st_mode) ? Type::tRegular :
S_ISLNK(st.st_mode) ? Type::tSymlink :
Type::tDirectory,
S_ISREG(st.st_mode) ? (uint64_t) st.st_size : 0,
S_ISREG(st.st_mode) && st.st_mode & S_IXUSR};
}
StringSet readDirectory(const Path & path) override
{
auto realPath = toRealPath(path);
auto entries = nix::readDirectory(path);
StringSet res;
for (auto & entry : entries)
res.insert(entry.name);
return res;
}
std::string readFile(const Path & path) override
{
return nix::readFile(toRealPath(path));
}
std::string readLink(const Path & path) override
{
return nix::readLink(toRealPath(path));
}
};
ref<FSAccessor> LocalFSStore::getFSAccessor()
{
return make_ref<LocalStoreAccessor>(ref<LocalFSStore>(std::dynamic_pointer_cast<LocalFSStore>(shared_from_this())));
}
void LocalFSStore::narFromPath(const Path & path, Sink & sink)
{
if (!isValidPath(path))
throw Error(format("path ‘%s’ is not valid") % path);
dumpPath(getRealStoreDir() + std::string(path, storeDir.size()), sink);
}
}
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